Island



{No Model.)

- E. H. CARTER & J; J. BEARD.

HEIGHT GAGE.

No. 495,019. Patented Apr. 11, 1893.

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mums mam cor moraumo wn 194510 a c UNITED ST res PATENT OFFICE.

EDl/VIN H. CARTER AND JOHN J. BEARD, OF PROVIDENCE, RHODE ISLAND.

HEIGHT-GAG E.

SPECIFICATION forming part of Letters Patent No. 495,019, dated April11, 1893.

Application filed September 13, 1892. Serial No. 445,833 (No model.)

To all whom it may concern: 7

Be it known that we, EDWIN H. CARTER and JOHN J. BEARD, citizens of theUnited States, residing at Providence,in the county of Providence andState of Rhode Island, have invented certain new and useful Improvementsin Height-Gages; and we do hereby declare the following to be afull,clear, and exact de' 'scription of the invention,such as willenable others skilled in the art to which it appertains to make and usethesame, reference being had to the accompanying drawings, and toletters of reference marked thereon, which form a part of thisspecification.

Our invention relates to adjustable height gages, that is gages adaptedto be used by machinists or tool makers.

It has been a common practice hitherto to employ gages consisting of aseries of planed metal blocks varying in height, although in some casesadjustable blocks have been used. Height blocks of this class areespecially adapted to gage the position of a planer tool or cutterpreparatory to removing the metal from the piece of work to be operatedupon.

The object we have in view is to provide a height gage with meanswhereby it can be veryaccurately adjusted, the gage at the same timehaving a wide range of adjustment and possessing great stability.

To this end our invention consists, essentially, of a base portionhaving a revoluble annular nut, provided with graduations, mountedtherein and prevented from endwise movement, in combination with aremovable screw-threaded standard having a scale or graduations thereonpassing through and in contact with said nut, all as will be more fullyhereinafter set forth and claimed.

By means of our improvement the gage can be readily adjusted in avertical direction, the construction being such that micrometer readingscan be made ofat leastone one-thousandth of an inch without difficulty.A further advantage of our height gage'is that by providing it with twoor more standards varying in length, it can take the place of a seriesof ordinary height blocks; the cost of our improved gage being much lessthan the series of blocks.

In the accompanying sheet of drawings, Figure l is a side elevation, inpartial section, of our improved height gage, the standard being at itslowest position. Fig. 2 is a similar view, showing the standard adjustedto its highest position. Fig. 3 is a top view. Fig. 4 is an invertedplan view, and Figs. 5 and 6 represent standards varying in length,there by adapting the gage to a greater range of adjustment.

A, again referring to the drawings, indicates our improved height gagecomplete; the same consisting essentially of the base or block portionb, the annular nut 41. and the standard 3. The base i) is bored outcentrally to accurately receive the nut, the lattcr being prevented frommoving longitudinally or endwise by means of the exterior circularflange n which is couuterbored into the upper end of the base; a cap Z2keeping the nut in place. This cap is bored centrally to receive theupper portion of the nut; the top end a of the latter being beveled andprovided with a series of peripheral divisions, forming a scale g, asclearly shown. The standard 3 is turned and ground so as to be true tosize; its upper end being at exactly right angles with the sides orlongitudinal axis. As drawn, the lower portion of the standard isenlarged in diameter, as at .9 said enlargement being screw-threaded andprovided with a longitudinal groove or spline c. The standard is furtherprovided with a series of transverse graduations, forming a scale 3',see Fig. 2, &c. A key is is rigidly secured to the base 1) below thelower end of the nut; this key extends upwardly through the spline c anda. distance into the nut, its upper end being free. Theikey is reducedin thickness along the portion adjacentto the nut to allow the latter toturn freely. By this arrangement it will be seen that the key acts as aguide for the standard and prevents it from turning.

The manner of operating our improved height gage is as follows lhe nut nis turned in the proper direction by the action of the thumb and fingerupon the portion of the flange n (which may be milled or reeded)extending beyond the sides of the base I); see Fig. 3. The result ofsuch action being to elevate or depress the standard 8 until the upperend of the latter reaches the desired point or distance. Assumingthescrew-threaded portion of the standard to have a thread say in thearrow-direction Fig.2, will elevate:

the standard one-fortieth of an inch; but if I it be turned only onetwenty-fifth of a revosisting of the base with thecounter-bored lutionthe corresponding distance moved by the standard will be onetwenty-fifth of one fortieth, or one one-thousandth of an inch.Obviously any other scale, either finer or coarser, may be adopted.

It the device be provided say with a series of interchangeablestandardss varying in length it is evident that its scope or range will becorrespondingly increased. Moreover, the cost will be very much lessthan a corresponding number of complete gages, each having but onestandard. 1

Figs. 5 and 6 show standards varying in length arranged to be used withthe base 12. The standard 5 may be uniform in diameter (the enlargedportions s being omitted) and screw-threaded and splined throughout thewhole or a portion of its length and the nut made correspondinglysmaller in diameter if desired without departing from the spirit of ourinvention.

We claim as new and desire to secure by United States Letters Patent 1.The herein described height-gage, conhole formed vertically therein, acylindrical annular nut fitted to and adapted to be rorated in saidhole, a stationary key, in, ex-

tending upwardly into the nut and a screw threaded and splined standardtrued off at its top end extending through the base and in engagementwith said nut and key.

2. In a height-gage, the combination of the base, provided with aremovable cap, a revoluble nut n seated in the base and extendingupwardly through said cap, a standard passing centrally through the nuthaving its lower portion screw-threaded and splined and an elongatedstationary key, fixed at its bottom end, in engagement with the splined.portion of said standard, arranged for operation substantially asdescribed. I!

3. In a height-gage provided with a suitable base portion, thecombination with the interiorly screw-threaded cylindrical nut m,arranged to be revolved in said base, having its upper end graduated toform a scale g, of a non-revolvingscrew-threaded standard passingthrough and coacting with said nut; the

standard being further provided with graduations 3 arranged to form withthe nut divisions a micrometer scale, substantially as described. 7 I

4. In aheight gage, the combination of a base, a revoluble annular nutmounted therein and non-movable endwise, a stationary key extendinglongitudinally of and contiguous to the bore or threaded portion of saidnut,

arranged to contact with the nut and key;

: the nutand standard having graduations thereon arranged to formamicrometer scale,

substantially as described.

In testimony whereof we have affixed our signatures in presence of twowitnesses.

EDWIN: HTQCARTER. 1 JOHN J; BEARD.

I and a standard provided with ascrew-thread- 1 ed and splinedenlargement at its lower end

